Sealing attic - Remove old insulation?

mjwcpaOctober 22, 2011

I have had an assessment of energy usage performed to identify air leaks etc. The contractor also quoted an attic sealing service. The quote included removing old (less than 10 years) blown in insulation, doing the sealing, then blowing in new insulation.

I can't figure out why you would remove then replace insulation. Any thoughts on why this would be required?

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brickeyee

"I can't figure out why you would remove then replace insulation."

So they can loacate ad seal the leaks.

The insulation can provide some god clues for larger leaks.

The insulation will trap dust and dirt from the moving air and there will be dirty spots in the insulation where the air moved through.

It has to be pulled back (at least) to then try to locate the actual leak and seal it.
If there are a lot of significant leaks it might be easier to just remove the old insulation, seal the leaks, then put new insulation in place.

    Bookmark   October 22, 2011 at 3:25PM
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mjwcpa

Thanks for the reply. I just assumed it could be moved around in order to seal. I can see it being easiest to remove.

    Bookmark   October 23, 2011 at 10:18AM
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brickeyee

"I can see it being easiest to remove."

Moving it around will tend to remove any loft it had, reducing its R value.

It often is a matter of scale.

With a lot of leaks I typically would take pictures to capture the leak spots showing in the insulation, then remove it and use the pictures to help locate the spots again to ensure they get sealed.

    Bookmark   October 23, 2011 at 10:29AM
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